/Engine/Source/Runtime/Engine/Public/WorldPartition/RuntimeHashSet/RuntimePartition.h
bool PopulateCellActorInstances ( const [TArray](API\Runtime\Core\Containers\TArray)< const [IStreamingGenerationContext::FActorSetInstance](API\Runtime\Engine\WorldPartition\IStreamingGenerationContext\FActorSetInstance) * > & ActorSetInstances, bool bIsMainWorldPartition, bool bIsCellAlwaysLoaded, [TArray](API\Runtime\Core\Containers\TArray)< [IStreamingGenerationContext::FActorInstance](API\Runtime\Engine\WorldPartition\IStreamingGenerationContext\FActorInstance) > & OutCellActorInstances )